An Escher sentence sent in by Don Blaheta: "Don would know how much more true that is than I do!"
Apparently it's something about the month of May:
We cannot/must not understate/overstate ... ? (5/6/2004)
Escher sentences (5/7/2004)
An Escher sentence in the wild (5/8/2004)
Approximate inference and global (in)coherence (5/9/2004)
High plains construction grammar (5/12/2004)
Escher sentences: prior art (5/15/2004)
What is linguistics, and why do they embarrass your international customers? (5/28/2004)
Things that are rarely better than they normally are (10/17/2005)
Asking Dr. Language Log (5/12/2006)
[Update: Marilyn Martin writes
In the '40s an issue of the Reader's Digest had a short section on what they called "wolf sentences."
Two that I remember are
I feel a lot more like I do now than I did before.
Please permit those who are going out first.
Google and the Proquest historical New York Times database both appear to be ignorant of the phrase "wolf sentence(s)": can anyone supply more information? ]
Posted by Mark Liberman at May 14, 2006 09:23 AM